US2425447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control structure
Assignee: Penn Electric Switch Co
•
Filing: 1943-06-29
•
Granted: 1947-08-12
•
Expires: 1963-06-29
Abstract
No abstract record available.
Inventors
- 👤 Leland B Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:07
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; Y; Y10; Y10T; Y10T74/00; Y10T74/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054328A
Cited
US1969304A
Cited
US1969326A
Cited
US2131282A
Cited
US2291501A
Cited
US2298795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |